Answer:
both the first one
Step-by-step explanation:
use unit rate
3(x+5)=7-x3x+15=7-x4x=-8x=-2
Answer:
b)0, yes
Step-by-step explanation:
Given:
Vectors (4,8) . (6,-3)
Finding inner product of vectors:
= 4x6 + 8x-3
=24-24
=0
Now to check the angle between them using formula a.b=|a|.|b|cosθ
|a|= 
=8.9
|b|=
=6.7
Putting values of a.b=0 and |a|=8.9, |b|=6.7 in a.b=|a|.|b|cosθ we get,
0= 8.9(6.7)cosθ
cosθ =0
θ=90 degrees
Hence the two vectors are perpendicular !
Answer:
the number would be 48 i think
Step-by-step explanation:
48 + 48 = 96
96 + 4 = 100
9514 1404 393
Answer:
1.311
Step-by-step explanation:
That multiplier is the product of the multipliers for each of the increases:
(1 +15%)(1 +14%) = 1.15×1.14 = 1.311